Here is the table of refrigerant system capacities from the 2003 Vibe factory service manual
1.41 lbs is 22.56 oz, so in 18 vs. 23, the book says 23.
The table and elsewhere in the HVAC section is says that the compressor gets 2.5 oz of PAG, but to replace with whatever amount came out of the old component. I don't know the effect of having more than what they've spec'd
Aside from the obvious external sheet metal differences, the HVAC system is one of the few differences between Matrix and Vibe
The site says you've been a member here for a while, but this is your first post, so, Welcome to GenVibe!